CN211652245U

CN211652245U - Gas sampling device

Info

Publication number: CN211652245U
Application number: CN201922107975.5U
Authority: CN
Inventors: 陈涛
Original assignee: Tianjin Zhiyi Times Technology Development Co ltd
Current assignee: Tianjin Zhiyi Times Technology Development Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-10-09
Anticipated expiration: 2029-11-29

Abstract

The utility model relates to the technical field of gas detection, and discloses a gas sampling device, which comprises a sampling head, a sampling pipe and a fan; this gas sampling device produces one through the rotation of inside fan and confirms speed, make gaseous from the sampling head flow direction sampling pipe, around the rotatory air current of sampling pipe axial, cooperation sampling head and the inside structure of sampling pipe, the particulate matter that can make the particle diameter be greater than the default in the gas is adsorbed on gas sampling device's inner wall, thereby the particulate matter that the particle diameter is greater than the default in the clear gas, greatly reduced the influence of the particulate matter outside the particle diameter scope that needs to detect in the gas to testing process, can effectively improve testing result's accuracy.

Description

Gas sampling device

Technical Field

The utility model relates to a gaseous detection technology field, concretely relates to gaseous sampling device.

Background

The detection of the particles in the environmental gas is often required in the work of weather, environmental monitoring and the like, and especially the detection and analysis of the particles with different particle size standards are respectively carried out, so that the detection method has important significance. In the existing gas sampling device, a structure for finely filtering and separating particles in gas is generally not available, so that a large number of particles in various particle size standard ranges exist in an obtained gas sample, and the accuracy of detection on specific particle size standard particles in gas is seriously influenced.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a gas sampling device, this gas sampling device can make the particulate matter that the particle diameter is greater than the default in the gas adsorbed on gas sampling device's inner wall to clear away the particulate matter that the particle diameter is greater than the default in the gas, make the accuracy to the detection of specific particle diameter standard particulate matter in the gas higher, the reference value that the testing result is used for correlation analysis is bigger.

In order to achieve the above object, the present invention provides the following technical solutions:

a gas sampling assembly, comprising: the sampling head comprises a sampling head air inlet and a sampling head air outlet; the sampling tube is internally provided with a tubular cavity for gas to pass through, one end of the tubular cavity is communicated with the gas outlet of the sampling head, and the other end of the tubular cavity is connected with a gas detection device; and the fan is arranged in the tubular cavity and used for generating airflow which determines the speed and enables the gas to flow from the sampling head to the sampling pipe and rotate around the sampling pipe in the axial direction.

The utility model discloses in, preferably, gas sampling device still includes a large granule gas adsorption component, is located the sampling head with between the sampling pipe, large granule gas adsorption component includes inside breather pipe and absorption chamber, inside breather pipe with sampling head gas outlet intercommunication, inside breather pipe is followed absorption chamber center is passed, absorption chamber with the sampling pipe intercommunication.

In the utility model, preferably, the gas sampling device further comprises a liquid discharge part, a liquid accumulation pipe and a liquid accumulation bottle, the liquid discharge part is provided with a gas transmission hole for gas to pass through and a liquid discharge hole for liquid to be discharged from the gas sampling device, the gas transmission hole is communicated with the upper bottom surface and the lower bottom surface of the liquid discharge part, the liquid discharge hole is communicated with the upper bottom surface and the side surface of the liquid discharge part, and the liquid discharge part is positioned between the large-particle gas adsorption part and the sampling pipe; one end of the liquid accumulating pipe is communicated with the liquid discharging hole on the side surface of the liquid discharging part, and the other end of the liquid accumulating pipe is communicated with the liquid accumulating bottle.

The utility model discloses in, it is preferred, gaseous sampling device still includes the heater block, is fixed in on the sampling pipe, be used for the heating gas in the sampling pipe.

In the present invention, preferably, the heating member is a heating bar.

The utility model discloses in, preferably, gas sampling device still includes the buffering part, buffering part both ends all are equipped with most advanced directional the toper cavity at buffering part center, the toper cavity at both ends passes through the tubulose cavity intercommunication at buffering part center, the buffering part is located the flowing back part with between the fan.

In the present invention, preferably, the sampling tube includes: the fan cap is positioned on one side of the fan, which is far away from the sampling head, is communicated with an air outlet of the sampling head, a funnel-shaped cavity is arranged in the fan cap, an internal connecting pipe is arranged at the bottom of the funnel-shaped cavity, and the fan is arranged at the top of the funnel-shaped cavity; one end of the sampling inner pipe is fixedly connected and communicated with the inner connecting pipe, and the other end of the sampling inner pipe is communicated with the inner and outer connecting parts and used for conveying gas; the sampling outer tube is sleeved outside the sampling inner tube, is fixedly connected with the outer wall of the fan cap and is used for protecting the sampling inner tube; the gas transmission joint is internally provided with a cavity for gas to pass through, is fixed on the sampling outer tube and is used for being directly communicated with a gas detection device; and a cavity for gas to pass through is arranged in the inner and outer connecting parts, one end of the inner and outer connecting parts is connected with the sampling inner pipe, the other end of the inner and outer connecting parts is connected with the gas transmission joint, and the sampling inner pipe is communicated with the gas transmission joint.

In the present invention, preferably, the sampling head includes: the upper and lower die sheets are pulled out, a funnel-shaped cavity is arranged in the upper and lower die sheets, the top of the funnel-shaped cavity is provided with a sampling head air inlet, and the bottom of the funnel-shaped cavity is provided with a sampling head air outlet; the filter disc covers the top of the funnel-shaped cavity of the upper and lower die plates and is used for filtering gas entering the upper and lower die plates; and the top cover covers on the filter sheet, is fixedly connected with the upper and lower pulling sheets, and leaves a gap for gas to enter at the edge of the upper and lower pulling sheets so as to enable the gas to enter from the side surface of the sampling head air inlet.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a gaseous sampling device produces one through the rotation of inside fan and confirms speed, make gaseous from sampling head flow direction sampling pipe, around sampling pipe axial rotation's air current, cooperation sampling head and the inside structure of sampling pipe, can make in the gas particle diameter be greater than the particulate matter of default adsorbed on gaseous sampling device's inner wall, thereby the particulate matter that the particle diameter is greater than the default in the gas is disposed, greatly reduced need the influence of the particulate matter outside the particle diameter range that detects in the gas to testing process, can effectively improve the accuracy of testing result

Drawings

Fig. 1 is a schematic structural diagram of a gas sampling apparatus.

FIG. 2 is a cross-sectional view of a gas sampling assembly.

Fig. 3 is an exploded view of a gas sampling assembly.

FIG. 4 is a schematic view showing the structure of a large particle gas adsorbing member.

Fig. 5 is a schematic view of the structure of the drainage member.

Fig. 6 is a schematic structural view of the cushioning member.

Fig. 7 is a schematic structural view of the fan cap.

Fig. 8 is a schematic structural view of the gas transmission joint.

Fig. 9 is a schematic view of the structure of the inner and outer connecting members.

In the drawings: 1-a sampling head, 2-a sampling pipe, 3-a fan, 4-a large-particle gas adsorption part, 5-a liquid discharge part, 6-a liquid accumulation pipe, 7-a liquid accumulation bottle, 8-a heating part, 9-a buffer part, 10-a fan cap, 11-a sampling inner pipe, 12-a sampling outer pipe, 13-an air transmission joint, 14-an inner and outer connecting part, 15-an upper and lower drawing die piece, 16-a filter sheet, 17-a top cover, 18-an inner vent pipe, 19-an adsorption cavity, 20-an air transmission hole, 21-a liquid discharge hole, 22-a sampling head air inlet, 23-a sampling head air outlet and 24-an inner connecting pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

An embodiment of the present invention provides a gas sampling device, please refer to fig. 1 and 2, including a sampling head 1, a sampling pipe 2 and a fan 3. Wherein, sampling

head gas outlet

23 and 2 one end fixed connection of sampling pipe to the two intercommunication, the 2 other ends of sampling pipe and gas detection device intercommunication, be fixed in that the inside fan 3 of sampling pipe 2 can produce through rotatory speed of confirming, make gaseous from sampling head 1 flow direction sampling pipe 2, around the rotatory air current of 2 axial of sampling pipe, and can change the speed of air current through adjusting the 3 rotation speed of fan.

In this embodiment, when the gas sampling apparatus is operated, the rotation of the fan 3 generates an airflow with a determined speed, which enables the gas to flow from the sampling head 1 to the sampling pipe 2 and to rotate around the axial direction of the sampling pipe 2, and the gas enters the sampling head 1 from the gas inlet 22 of the sampling head and enters the sampling pipe 2 through the gas outlet 23 of the sampling head. According to the cutting principle of the gas particulate cutter, particulate particles in gas pass through the inner cavity structure at a determined speed, and due to different particle sizes and different mass inertias, when large particles pass through the zigzag inner cavity, the inertia is larger, the large particles collide with an interception object to be adhered, and small particles pass through the zigzag inner cavity smoothly. When the gas passes through the sampling head 1 and the sampling pipe 2, an airflow with a determined speed is generated due to the rotation of the fan 3, wherein the particulate matters with the particle sizes larger than the preset value are adhered to the inner wall of the gas sampling device, and the particulate matters with the particle sizes smaller than or equal to the preset value pass through the sampling pipe 2. Finally, the gas enters the gas detection device through the sampling pipe 2.

An embodiment of the utility model provides a gas sampling device, please refer to fig. 1 to 4, including sampling head 1, sampling pipe 2, fan 3 and large granule gas adsorption component 4. Wherein, large granule gas adsorption component 4 is located between sampling head 1 and the sampling pipe 2, including inside breather pipe 18 and absorption chamber 19, inside breather pipe 18 and sampling head gas outlet 23 intercommunication, inside breather pipe 18 passes from absorption chamber 19 center. Sampling tube 2 one end is connected with large granule gas adsorption component 4 to the two intercommunication, the other end and gas detection device intercommunication.

In this embodiment, when the gas sampling apparatus is operated, the rotation of the fan 3 generates an airflow which has a determined speed, and causes the gas to flow from the sampling head 1 to the sampling pipe 2 and to rotate around the axial direction of the sampling pipe 2, and the gas enters the sampling head 1 from the gas inlet 22 of the sampling head and enters the large particle gas adsorption component 4 through the gas outlet 23 of the sampling head. Because the rotation of the interior air current of large granule gas adsorption element 4, and large granule gas adsorption element 4 internal diameter is great, the inner wall of large granule gas adsorption element 4 can be strikeed to because inertia is great in the gas to the adhesion is on it, and the small granule passes through large granule gas adsorption element 4, thereby gets rid of the large granule thing in the gas. Then, when the gas passes through the sampling pipe 2, an airflow with a determined speed is generated due to the rotation of the fan 3, wherein the particulate matters with the particle sizes larger than the preset value are adhered to the inner wall of the gas sampling device, and the particulate matters with the particle sizes smaller than or equal to the preset value pass through the sampling pipe 2, so that the particulate matters with the particle sizes larger than the preset value in the gas are cleaned again. Finally, the gas enters the gas detection device through the sampling pipe 2.

An embodiment of the utility model provides a gas sampling device, please refer to fig. 1 to 5, including sampling head 1, sampling pipe 2, fan 3, large granule gas adsorption component 4, flowing back part 5, hydrops pipe 6 and hydrops bottle 7. Wherein, flowing back part 5 is equipped with the gas transmission hole 20 that supplies gas to pass through and the outage 21 that supplies liquid exhaust gas sampling device, and gas transmission hole 20 communicates the last bottom surface and the lower bottom surface of flowing back part 5, and outage 21 communicates the last bottom surface and the side of flowing back part 5, and flowing back part 5 is located between large granule gas adsorption component 4 and sampling tube 2, and its upper and lower bottom surface communicates with large granule gas adsorption component 4, and lower bottom surface communicates with sampling tube 2. One end of the liquid accumulating pipe 6 is communicated with the liquid discharging hole 21 at the side surface of the liquid discharging part 5, and the other end is communicated with the liquid accumulating bottle 7, and the liquid discharged from the liquid discharging hole 21 flows into the liquid accumulating bottle 7.

In this embodiment, when the gas sampling apparatus is operated, the rotation of the fan 3 generates an airflow which has a determined speed, and causes the gas to flow from the sampling head 1 to the sampling pipe 2 and to rotate around the axial direction of the sampling pipe 2, and the gas enters the sampling head 1 from the gas inlet 22 of the sampling head and enters the large particle gas adsorption component 4 through the gas outlet 23 of the sampling head. Because the rotation of the interior air current of large granule gas adsorption element 4, and large granule gas adsorption element 4 internal diameter is great, the inner wall of large granule gas adsorption element 4 can be strikeed to because inertia is great in the gas to the adhesion is on it, and the small granule passes through large granule gas adsorption element 4, thereby gets rid of the large granule thing in the gas. Meanwhile, a part of the water vapor in the gas condenses on the inner wall of the large particle gas adsorbing member 4 and the upper bottom surface of the liquid discharging member 5 to form liquid water, and the liquid water flows into the liquid accumulating bottle 7 through the liquid discharging hole 21 and the liquid accumulating pipe 6 in sequence. Then, when the gas passes through the sampling pipe 2, an airflow with a determined speed is generated due to the rotation of the fan 3, wherein the particles with the particle size larger than the preset value are adhered to the pipe wall, and the particles with the particle size smaller than or equal to the preset value pass through the sampling pipe 2, so that the particles with the particle size larger than the preset value in the gas are cleaned again. Finally, the gas enters the gas detection device through the sampling pipe 2.

An embodiment of the utility model provides a gas sampling device, please refer to fig. 1 to 5, including sampling head 1, sampling pipe 2, fan 3, large granule gas adsorption component 4, flowing back part 5, hydrops pipe 6, hydrops bottle 7 and heater block 8. Wherein, flowing back part 5 is equipped with the gas transmission hole 20 that supplies gas to pass through and the outage 21 that supplies liquid exhaust gas sampling device, and gas transmission hole 20 communicates the last bottom surface and the lower bottom surface of flowing back part 5, and outage 21 communicates the last bottom surface and the side of flowing back part 5, and flowing back part 5 is located between large granule gas adsorption component 4 and sampling tube 2, and its upper and lower bottom surface communicates with large granule gas adsorption component 4, and lower bottom surface communicates with sampling tube 2. One end of the liquid accumulating pipe 6 is communicated with the liquid discharging hole 21 at the side surface of the liquid discharging part 5, and the other end is communicated with the liquid accumulating bottle 7, and the liquid discharged from the liquid discharging hole 21 flows into the liquid accumulating bottle 7. The heating part is fixed on the sampling pipe 2 and used for heating the gas in the sampling pipe 2.

In this embodiment, when the gas sampling apparatus is operated, the rotation of the fan 3 generates an airflow which has a determined speed, and causes the gas to flow from the sampling head 1 to the sampling pipe 2 and to rotate around the axial direction of the sampling pipe 2, and the gas enters the sampling head 1 from the gas inlet 22 of the sampling head and enters the large particle gas adsorption component 4 through the gas outlet 23 of the sampling head. Because the rotation of the interior air current of large granule gas adsorption element 4, and large granule gas adsorption element 4 internal diameter is great, the inner wall of large granule gas adsorption element 4 can be strikeed to because inertia is great in the gas to the adhesion is on it, and the small granule passes through large granule gas adsorption element 4, thereby gets rid of the large granule thing in the gas. Meanwhile, a part of the water vapor in the gas condenses on the inner wall of the large particle gas adsorbing member 4 and the upper bottom surface of the liquid discharging member 5 to form liquid water. Because heating block 8 heats the gas in sampling pipe 2, the moisture in the gas that gets into sampling pipe 2 can reduce condensing in sampling pipe 2 owing to being heated to the form of vapor assembles the upper bottom surface of the inner wall of large granule gas adsorption component 4 and flowing back part 5 again, condenses into liquid water, thereby plays the effect of further dehumidification to the gas that gets into in the gas sampling device. The liquid water condensed on the inner wall of the large particle gas adsorbing member 4 and the upper bottom surface of the liquid discharging member 5 flows into the liquid accumulating bottle 7 through the liquid discharging hole 21 and the liquid accumulating tube 6 in order. Then, when the gas passes through the sampling pipe 2, an airflow with a determined speed is generated due to the rotation of the fan 3, wherein the particles with the particle size larger than the preset value are adhered to the pipe wall, and the particles with the particle size smaller than or equal to the preset value pass through the sampling pipe 2, so that the particles with the particle size larger than the preset value in the gas are cleaned again. Finally, the gas enters the gas detection device through the sampling pipe 2.

An embodiment of the utility model provides a gas sampling device, please refer to fig. 1 to 5, including sampling head 1, sampling pipe 2, fan 3, large granule gas adsorption component 4, flowing back part 5, hydrops pipe 6, hydrops bottle 7 and heater block 8. Wherein, heating element 8 is the heating strip, and is attached on sampling pipe 2 for heat the gas in sampling pipe 2.

In this embodiment, when the gas sampling apparatus is operated, the rotation of the fan 3 generates an airflow which has a determined speed, and causes the gas to flow from the sampling head 1 to the sampling pipe 2 and to rotate around the axial direction of the sampling pipe 2, and the gas enters the sampling head 1 from the gas inlet 22 of the sampling head and enters the large particle gas adsorption component 4 through the gas outlet 23 of the sampling head. Because the rotation of the interior air current of large granule gas adsorption element 4, and large granule gas adsorption element 4 internal diameter is great, the inner wall of large granule gas adsorption element 4 can be strikeed to because inertia is great in the gas to the adhesion is on it, and the small granule passes through large granule gas adsorption element 4, thereby gets rid of the large granule thing in the gas. Meanwhile, a part of the water vapor in the gas condenses on the inner wall of the large particle gas adsorbing member 4 and the upper bottom surface of the liquid discharging member 5 to form liquid water. As the heating strip of heating block 8 heats the gas in sampling pipe 2, the moisture in the gas that gets into sampling pipe 2 can reduce condensing in sampling pipe 2 owing to being heated to the form of vapor assembles the upper bottom surface of the inner wall of large granule gas adsorption component 4 and flowing back part 5 again, condenses into liquid water, thereby plays the effect of further dehumidification to the gas that gets into in the gas sampling device. The liquid water condensed on the inner wall of the large particle gas adsorbing member 4 and the upper bottom surface of the liquid discharging member 5 flows into the liquid accumulating bottle 7 through the liquid discharging hole 21 and the liquid accumulating tube 6 in order. Then, when the gas passes through the sampling pipe 2, an airflow with a determined speed is generated due to the rotation of the fan 3, wherein the particles with the particle size larger than the preset value are adhered to the pipe wall, and the particles with the particle size smaller than or equal to the preset value pass through the sampling pipe 2, so that the particles with the particle size larger than the preset value in the gas are cleaned again. Finally, the gas enters the gas detection device through the sampling pipe 2.

An embodiment of the utility model provides a gas sampling device, please refer to fig. 1 to 6, including sampling head 1, sampling pipe 2, fan 3, large granule gas adsorption component 4, flowing back part 5, hydrops pipe 6, hydrops bottle 7 and buffer part 9. Wherein, flowing back part 5 is equipped with the gas transmission hole 20 that supplies gas to pass through and the outage 21 that supplies liquid exhaust gas sampling device, and gas transmission hole 20 communicates the last bottom surface and the lower bottom surface of flowing back part 5, and outage 21 communicates the last bottom surface and the side of flowing back part 5, and flowing back part 5 is located between large granule gas adsorption component 4 and sampling tube 2, and its upper and lower bottom surface communicates with large granule gas adsorption component 4, and lower bottom surface communicates with sampling tube 2. One end of the liquid accumulating pipe 6 is communicated with the liquid discharging hole 21 at the side surface of the liquid discharging part 5, and the other end is communicated with the liquid accumulating bottle 7, and the liquid discharged from the liquid discharging hole 21 flows into the liquid accumulating bottle 7. The two ends of the buffering component 9 are respectively provided with a conical cavity with the tip pointing to the center of the buffering component 9, the conical cavities at the two ends are communicated through a tubular cavity at the center of the buffering component 9, and the buffering component 9 is positioned between the liquid discharging component 5 and the fan 3 and plays a role in correcting the flowing direction of air.

In this embodiment, when the gas sampling apparatus is operated, the rotation of the fan 3 generates an airflow which has a determined speed, and causes the gas to flow from the sampling head 1 to the sampling pipe 2 and to rotate around the axial direction of the sampling pipe 2, and the gas enters the sampling head 1 from the gas inlet 22 of the sampling head and enters the large particle gas adsorption component 4 through the gas outlet 23 of the sampling head. Because the rotation of the interior air current of large granule gas adsorption element 4, and large granule gas adsorption element 4 internal diameter is great, the inner wall of large granule gas adsorption element 4 can be strikeed to because inertia is great in the gas to the adhesion is on it, and the small granule passes through large granule gas adsorption element 4, thereby gets rid of the large granule thing in the gas. Meanwhile, a part of the water vapor in the gas condenses on the inner wall of the large particle gas adsorbing member 4 and the upper bottom surface of the liquid discharging member 5 to form liquid water, and the liquid water flows into the liquid accumulating bottle 7 through the liquid discharging hole 21 and the liquid accumulating pipe 6 in sequence. The gas then passes from the gas transfer port 20 into the upper conical cavity of the buffer member 9, through the central tubular cavity, the lower conical cavity, and into the sampling tube 2. Because the gas transmission hole 20 may be arranged at a position deviated from the center of the liquid discharge part 5, the flowing direction of the gas entering the sampling pipe 2 is not necessarily vertical to the fan 3, so that the rotating direction of the gas flow in the sampling pipe 2 is inclined and deviated from the direction around the axial direction of the sampling pipe, and the cleaning of the sampling pipe 2 on particles in the gas is influenced, but due to the correction of the buffer part 9, the gas can enter the sampling pipe 2 from the center of the sampling pipe 2 to be vertical to the fan 3, so that the rotating direction of the gas flow in the sampling pipe 2 is ensured to be around the axial direction of the sampling pipe 2. When the particles pass through the sampling pipe 2, an airflow with a determined speed is generated due to the rotation of the fan 3, wherein the particles with the particle size larger than the preset value are adhered to the pipe wall, and the particles with the particle size smaller than or equal to the preset value pass through the sampling pipe 2, so that the particles with the particle size larger than the preset value in the air are cleaned again. Finally, the gas enters the gas detection device through the sampling pipe 2.

An embodiment of the present invention provides a gas sampling device, please refer to fig. 1, fig. 2, fig. 3, fig. 7, fig. 8 and fig. 9, which includes a sampling head 1, a fan 3, a fan cap 10, a sampling inner tube 11, a sampling outer tube 12, a gas transmission joint 13 and an inner and outer connecting component 14. Wherein the fan 3 can generate an airflow with determined speed, which enables the gas to flow from the sampling head 1 to the sampling inner tube 11 and rotate around the sampling inner tube 11 axially, and the speed of the airflow can be changed by adjusting the rotating speed of the fan 3. The inside hourglass hopper-shaped cavity that is equipped with of one end of fan cap 10, the top and the sampling head gas outlet 23 fixed connection and the intercommunication of hourglass hopper-shaped cavity, fan 3 are fixed in fan cap 10 and the junction of sampling head 1, install in the top position of leaking hopper-shaped cavity. The bottom of the funnel-shaped cavity of the fan cap 10 is an internal connecting pipe 24, one end of the sampling inner pipe 11 is fixedly connected and communicated with the internal connecting pipe 24, and the other end is communicated with a gas detection device for conveying gas. The sampling outer tube 12 is sleeved outside the sampling inner tube 11, and is fixedly connected with the outer wall of the fan cap 10 to protect the sampling inner tube 11. The gas transmission joint 13 is provided with a cavity for gas to pass through, is fixed on the sampling outer tube 12, and is used for being directly communicated with a gas detection device. The inner and outer connecting parts 14 are provided with a cavity for gas to pass through, one end of the inner and outer connecting parts is connected with the sampling inner tube 11, the other end is connected with the gas transmission joint 13, and the sampling inner tube 11 is communicated with the gas transmission joint 13.

In this embodiment, when the gas sampling apparatus operates, the rotation of the fan 3 generates an airflow with a determined speed, which enables the gas to flow from the sampling head 1 to the sampling inner tube 11 and to rotate around the axial direction of the sampling inner tube 11, and the gas enters the sampling head 1 from the sampling head air inlet 22 and sequentially enters the fan cap 10 and the sampling inner tube 11 through the sampling head air outlet 23. When the gas passes through the sampling head 1, the fan cap 10 and the sampling inner tube 11, an airflow with a determined speed is generated due to the rotation of the fan 3, wherein the particulate matters with the particle size larger than the preset value are adhered to the inner walls of all the parts, and the particulate matters with the particle size smaller than or equal to the preset value pass through the sampling inner tube 11. Because the inner diameter of the sampling inner tube 11 is smaller, the cleaning of particles with smaller particle sizes in the gas can be realized according to the requirement. Finally, the gas enters the gas detection device from the sampling inner tube 11 through the inner and outer connecting parts 14 and the gas transmission joint 13 in sequence.

An embodiment of the present invention provides a gas sampling device, please refer to fig. 1 to fig. 3, including a sampling head 1, a sampling pipe 2 and a fan 3. Wherein, sampling

head gas outlet

24 and 2 one end fixed connection of sampling pipe to the two intercommunication, the 2 other ends of sampling pipe and gas detection device intercommunication, be fixed in that the inside fan 3 of sampling pipe 2 can produce through rotatory speed of confirming, make gaseous from sampling head 1 flow direction sampling pipe 2, around the air current of 2 axial rotations of sampling pipe, and can change the speed of air current through adjusting the 3 rotation speed of fan. The sampling head 1 comprises an upper and lower pull-out die plate 15, a filter 16 and a top cover 17. A funnel-shaped cavity is arranged inside the upper and lower pulling die piece 15, the top of the funnel-shaped cavity is provided with a sampling head air inlet 22, and the bottom of the funnel-shaped cavity is provided with a sampling head air outlet 23; the filter sheet 16 covers the top of the funnel-shaped cavity of the upper and lower drawing die sheets 15 and is used for filtering the gas entering the upper and lower drawing die sheets 15; the top cover 17 covers the filter 16 and is fixedly connected with the upper and lower dies 15, and a gap for air to enter the upper and lower dies 15 is reserved at the edge of the upper and lower dies 15 for enabling the air to enter the air inlet 22 of the sampling head from the side.

In this embodiment, when the gas sampling apparatus is operated, the rotation of the fan 3 generates an airflow with a determined speed, which causes the gas to flow from the sampling head 1 to the sampling tube 2 and to rotate around the axial direction of the sampling tube 2, and the gas enters the funnel-shaped cavity of the upper and lower dies 15 from the gap between the top cover 17 and the upper and lower dies 15 through the filter 16 and enters the sampling tube 2 from the bottom of the funnel-shaped cavity. In this way, the gas is filtered by the filter sheet 16 before entering the upper and lower pulling sheets 15, so that larger impurities in the gas can be intercepted outside the gas sampling device. When the gas passes through the sampling head 1 and the sampling pipe 2, an airflow with a determined speed is generated due to the rotation of the fan 3, wherein the particles with the particle size larger than the preset value are adhered to the pipe wall, and the particles with the particle size smaller than or equal to the preset value pass through the sampling pipe 2. Finally, the gas enters the gas detection device through the sampling pipe 2.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims

1. A gas sampling assembly, comprising:

the sampling head comprises a sampling head air inlet and a sampling head air outlet;

the sampling tube is internally provided with a tubular cavity for gas to pass through, one end of the tubular cavity is communicated with the gas outlet of the sampling head, and the other end of the tubular cavity is connected with a gas detection device;

and the fan is arranged in the tubular cavity and used for generating airflow which determines the speed and enables the gas to flow from the sampling head to the sampling pipe and rotate around the sampling pipe in the axial direction.

2. The gas sampling device of claim 1, further comprising a large particle gas adsorption component positioned between the sampling head and the sampling tube, wherein the large particle gas adsorption component comprises an internal vent tube and an adsorption cavity, the internal vent tube is communicated with the gas outlet of the sampling head, the internal vent tube passes through the center of the adsorption cavity, and the adsorption cavity is communicated with the sampling tube.

3. The gas sampling device of claim 2, further comprising a liquid discharge member, a liquid accumulation tube, and a liquid accumulation bottle,

the liquid drainage part is provided with a gas transmission hole for gas to pass through and a liquid drainage hole for liquid to be drained out of the gas sampling device, the gas transmission hole is communicated with the upper bottom surface and the lower bottom surface of the liquid drainage part, the liquid drainage hole is communicated with the upper bottom surface and the side surface of the liquid drainage part, and the liquid drainage part is positioned between the large-particle gas adsorption part and the sampling pipe;

one end of the liquid accumulating pipe is communicated with the liquid discharging hole on the side surface of the liquid discharging part, and the other end of the liquid accumulating pipe is communicated with the liquid accumulating bottle.

4. The gas sampling assembly of claim 3, further comprising a heating element secured to the sampling tube for heating the gas within the sampling tube.

5. A gas sampling assembly according to claim 4, wherein the heating element is a heating bar.

6. The gas sampling device according to claim 3, further comprising a buffer member, wherein the buffer member is provided with a conical cavity at both ends, the conical cavity at both ends points to the center of the buffer member, the conical cavities at both ends are communicated through a tubular cavity at the center of the buffer member, and the buffer member is positioned between the liquid discharge member and the fan.

7. A gas sampling assembly according to claim 1, wherein said sampling tube comprises: a fan cap, an inner sampling pipe, an outer sampling pipe, an air transmission joint and an inner and outer connecting part,

the fan cap is positioned on one side of the fan, which is far away from the sampling head, is communicated with the air outlet of the sampling head, a funnel-shaped cavity is arranged inside the fan cap, an internal connecting pipe is arranged at the bottom of the funnel-shaped cavity, and the fan is arranged at the top of the funnel-shaped cavity;

one end of the sampling inner pipe is fixedly connected and communicated with the inner connecting pipe, and the other end of the sampling inner pipe is communicated with the inner and outer connecting parts and used for conveying gas;

the sampling outer tube is sleeved outside the sampling inner tube, is fixedly connected with the outer wall of the fan cap and is used for protecting the sampling inner tube;

the gas transmission joint is internally provided with a cavity for gas to pass through, is fixed on the sampling outer tube and is used for being directly communicated with a gas detection device;

and a cavity for gas to pass through is arranged in the inner and outer connecting parts, one end of the inner and outer connecting parts is connected with the sampling inner pipe, the other end of the inner and outer connecting parts is connected with the gas transmission joint, and the sampling inner pipe is communicated with the gas transmission joint.

8. A gas sampling assembly according to claim 1, wherein the sampling head comprises:

the upper and lower die sheets are pulled out, a funnel-shaped cavity is arranged in the upper and lower die sheets, the top of the funnel-shaped cavity is provided with a sampling head air inlet, and the bottom of the funnel-shaped cavity is provided with a sampling head air outlet;

the filter disc covers the top of the funnel-shaped cavity of the upper and lower die plates and is used for filtering gas entering the upper and lower die plates;

and the top cover covers on the filter sheet, is fixedly connected with the upper and lower pulling sheets, and leaves a gap for gas to enter at the edge of the upper and lower pulling sheets so as to enable the gas to enter from the side surface of the sampling head air inlet.